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Mangkunegara III ꦩꦁꦏꦸꦤꦒꦫ꧇꧓꧇
Kangjeng Gusti Prince Adipati Arya
Adipati Mangkunegaran ke-3
Reign	January 29, 1835 - January 06, 1853 (18 years old)
Coronation	January 16, 1843
Predecessor	Mangkunegara II
Successor	Mangkunegara IV
Born	BRM. Sarengat (1803-01-16)January 16, 1803 Pura Mangkunegaran, Surakarta, Dutch East Indies
Died	January 6, 1853(1853-01-06) (aged 49) Pura Mangkunegaran, Surakarta, Dutch East Indies
Consort	GKR. Sekar Kedhaton RAy. Samsiyah [1]
Spouses	14 concubines [2]
Issue	42
Father	KPH. Natakusuma
Mother	BRAy. Sayati
Religion	Islam

Kanjeng Gusti Pangeran Adipati Arya Mangkunegara III is the third Duke who reigns in the Duchy of Pura Mangkunegaran. His birth name is Raden Mas Sarengat Airport, while other titles are "Kanjeng Pangeran Riya" and "Kanjeng Pangeran Arya Prabu Prangwadana".

He is the grandson of KGPAA. Mangkunegara II, through his daughter (from the empress), BRAy. Sayati who is married to Kangjeng Pangeran Harya Natakusuma (son of KPH. Kusumadiningrat and GRAy. Kusumadiningrat). So that KGPAA. Mangkunegara III is still a great-grandfather of Susuhunan Pakubuwana III.